Fan Failure; Configuration Terminal Problems; No Terminal Display - NEC QX-S6648XP-6Q Installation Manual

Installation Guide
QX-S6600 Series Ethernet Switches
information about the LEDs on a power module, see Hot swappable power modules.
The LEDs on the power module are steady green (active) or flashing green (standby) while
the power module system is properly operating. If the LEDs behave in any other way, verify
the following items:
The switch power cord is properly connected.

The power source meets the requirement.

The operating temperature of the switch is in the normal range and the power module

has good ventilation.
If the problem persists, contact the NEC technical support for help.
To replace a power module, see "Chapter3 Installing/removing a power module."

Fan failure

CAUTION:
Each of the QX-S6600 Series requires two same direction air flow fan trays to function properly.
･Do not operate the system with one failed fan tray for more than 24 hours.
･Do not remove the failed fan tray until you are ready for replacing it.
･Do not operate the system without any fan tray for more than 2 minutes.
･Do not operate the system outside of the temperature range 0°C to 45°C (32°F to 113°F) degrees.
Failure to comply with these operating requirements may void the warranty.
When a fan tray has problems, the system status LED is steady red and the system outputs
alarm messages.
To replace a failed fan tray, see "Chapter3 Installing/removing a fan tray."

Configuration terminal problems

If the configuration environment setup is correct, the configuration terminal displays booting
information when the switch is powered on. If the setup is incorrect, the configuration
terminal displays nothing or garbled text.

7.4.1 No terminal display

If the configuration terminal displays nothing when the switch is powered on, verify the
7 Maintenance and troubleshooting
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